Light source for indoor plant cultivation

ABSTRACT

The present invention relates to the technical field of plant cultivation through artificial light, and particularly provides a light environment method for plant cultivation through full-artificial light to provide a full-artificial light source for plant growth. The light source includes a light wave with a waveband of 620 nm to 760 nm, and the number of photons of the light wave of 620 nm to 760 nm accounts for 64% to 76% of the total number of photons of the light source. Compared with traditional light sources, such as existing fluorescent lamps and high-pressure sodium lamps, the present invention adopting a mode of light source proportion and light source combination can greatly improve the yield of the plant. Compared with a traditional LED lamp light source proportion scheme, the light source proportion scheme of the present invention has the advantages that the waveband of a selected light source is more precise, the influence caused by other plant growth parameters is small, and a more targeted effect is achieved in the process of promoting plant growth. By using the precise combination and proportion of the precise waveband of the light wave, a peak wavelength and a photon proportion, the present invention can more precisely control a plant growth effect, and thereby promoting the plant growth.

BACKGROUND Technical Field

The present invention relates to the technical field of plantcultivation through artificial light, and particularly relates to alight source for plant cultivation through full-artificial light.

Related Art

Light is a basic environmental factor for plant growth and development.It is not only a basic energy source for photosynthesis, but also animportant regulatory factor for plant growth and development, and playsan important role on the morphogenesis, reproductive development andsecondary metabolite regulation and control of the plant. The plantgrowth and development are influenced by the light quality, illuminationintensity, illumination period and illumination mode. According totraditional cognition, all things grow in a way of being dependent onthe sun, on the earth, the sun is the main source of visible (i.e.,light) and invisible electromagnetic radiation, and it is the mainfactor sustaining the life. The net daily average solar energy reachingthe earth is about 28×10{circumflex over ( )}23 J (i.e., 265 EBtu). Thisvalue is 5500 times the world annual primary energy consumption of 479Pbtu estimated in 2007. The spectral distribution of solar radiationwhich can be measured on the surface of the earth has a wide band rangebetween about 300 nm and 1000 nm. However, only 50% of the radiationreaching the surface of the earth is photosynthetically active radiation(PAR), i.e., the radiation energy between 400 nm and 700 nm. Plantsabsorb and transform light energy mainly through photosynthetic systems,photoreceptors of the plants are active elements mainly existing on theleaves of plants, and are responsible for capturing photons andconverting photon energy into chemical energy.

The era of artificial light sources began with the Edison bulb, i.e.,the incandescent lamp, developed by Thomas Edison in 1879. Therefore,the application of artificial light sources in the field of plantlighting was first started from the incandescent lamps, mainly passedthrough the stages of fluorescent lamps and high-pressure sodium lamps(HPS), and has reached the stage of LED lamps at present. Theincandescence is characterized by a large amount of far-infraredradiation, which can reach about 60% of the total PAR, but theelectricity efficiency of the incandescent lamps defined by theconversion efficiency between the electrical energy (input) and theemitted light energy (output) in the visible spectrum is still very low,and is usually about 10%. The service life of the incandescent lamp isnot longer than 1000 hours, and is short, so that its application toplant growth is limited. Compared with the incandescent lamp, thefluorescent lamp achieves improved electricity-light energy conversionefficiency, and has the power usually less than 40 W. Theelectricity-to-light conversion efficiency of international brand T8 orT5 fluorescent lamps is close to 30%, and the electricity-to-lightconversion efficiency of general products is between 20% and 30%,wherein more than 90% of the emitted photons are in the PAR range, theblue light energy depends on the correlated color temperature (CCT) ofthe lamps, and can reach 10% or higher of the total photon emission inthe PAR range. Therefore, for plant varieties with weak light demand orin short-distance application scenarios, fluorescent lamps are widelyused in sealed growth rooms and artificial climate boxes to completelyreplace sunlight. The high-pressure sodium lamp (HPS) belongs to a gasdischarge lamp with the power generally in a range of 400 W to 1000 Wand the electricity-to-light conversion efficiency in a range of 30% to35%, about 70% of the emitted photons are in the PAR range, and the HPSis often used as a preferred light source for high-light-demand plantsor crop production in greenhouses throughout the year. However, theachievable spectral energy distribution of both the fluorescent lamp andthe high-pressure sodium lamp is limited due to their spectral designlimitation, and the spectral quality is not optimal for promotingphotosynthesis and photomorphogenesis, so that excessive growth ofleaves and stems is caused. This is due to the unbalanced spectralemission related to the absorption peaks of important photosyntheticpigments such as chlorophyll a, chlorophyll b, and β carotene.Additionally, different types of plants have different requirements onthe light environment, this will cause very low effective conversionenergy efficiency and great energy waste, so that the operation costincrease of indoor plant cultivation through artificial light is caused.

Therefore, based on the above reasons, light-emitting diodes (LED) andrelated solid-state lighting (SSL) are potentially feasible andpromising tools for plant lighting. The LED has various advantages suchas high luminous efficiency, long service life, narrow spectrum and highspectral selectivity. However, novel commercial high-brightness LEDproducts have the main energy in a green-yellow wavelength range of 500nm to 600 nm, which have the efficient response to human vision, butcannot effectively respond to the photosynthesis process. According totechnical principles, the spectrum efficiently responding to thephotosynthesis can be realized by combining different types ofsemiconductors or photoluminescent materials such as GaN, GaAs and GaP.

At present, plants cultivated through artificial light mainly includeleaf vegetables, solanaceous vegetables, medicinal plants, hemp plants,floral plants, model plants, large economic crops, high-value shrubs,etc. In the prior art, spectral energy distribution characteristics,such as peak wavelength, RB and R/FR at different growth stages ofdifferent plants have been disclosed, and even specific energydistribution data has been provided for specific growth stages ofspecific plants, but a spectrum capable of meeting the joint healthygrowth of various kinds of the above plants has not been provided.

A first objective of the present invention is to provide a light sourcecapable of meeting the healthy growth of various plants underfull-artificial light, and its healthy growth includes a completeprocess of the whole growth and development.

A second objective of the present invention is that the providedspectrum meets the proceeding of efficient photosynthesis and achievesthe functions of obvious yield improvement and quality improvementcompared with the traditional fluorescent lamp or HPS.

A third objective of the present invention is that through theoptimization via a great number of scientific research experiments onthe provided spectrum, the spectrum energy beneficial to thephotosynthesis, morphogenesis, reproductive development and the like ofthe plant is improved, and the spectrum energy with low plantutilization rate and little influence on plants is reduced.

A fourth objective of the present invention is that the providedspectrum can be realized by adopting an LED technology, and anillumination apparatus using the spectrum can realize higherelectricity-light conversion efficiency and better energy-saving effect.

SUMMARY

In order to achieve the above objectives, a more precise light sourcewhich has less adjusting parameter types and can avoid requirement ofmore frequent parameter control in the plant growth process due toadjustment of too much types of parameters needs to be provided; inaddition, the precise control of a single type of parameter can moreprecisely control the plant growth effect, and thus promoting the plantgrowth.

In order to achieve the above objectives, the present invention providesa spectrum for plant cultivation through full-artificial light, afull-artificial light source is provided for plant growth, the lightsource includes a light wave with a waveband of 620 nm to 760 nm, andthe number of photons of the light wave of 620 nm to 760 nm accounts for64% to 76% of the total number of photons of the light source.

Generally, the plant is cultivated indoor. A greenhouse planting modecan be adopted.

Preferably, the number of photons in a waveband of 700 nm to 760 nm inthe light source accounts for 3% to 38% of the number of the photons inthe waveband of 620 nm to 760 nm.

Preferably, a peak wavelength of the light wave with the waveband of 620nm to 760 nm is preferably in a range of 650 nm to 700 nm or 730 nm to740 nm.

Further preferably, the peak wavelength of the light wave with thewaveband of 620 nm to 760 nm is preferably one or a combination of twoor three of 650 nm, 660 nm, 680 nm, 695 nm, and 735 nm.

Preferably, the light wave with the waveband of 620 nm to 760 nm isrealized by using an LED light source.

Preferably, a full width at half maximum of the light wave correspondingto the peak wavelength in the range of 650 nm to 700 nm or 730 nm to 740nm is smaller than 35 nm.

Preferably, the light source further includes a light wave with awaveband of 400 nm to 499 nm, and a ratio of the total number of thephotons in the waveband of 620 nm to 760 nm to the total number ofphotons in the waveband of 400 nm to 499 nm is 4-7:1.

Preferably, a peak wavelength of the light wave with the waveband of 400nm to 499 nm is preferably in a range of 430 nm to 460 nm.

Further preferably, the peak wavelength of the light wave with thewaveband of 400 nm to 499 nm is preferably one or a combination of anytwo or three of 435 nm, 440 nm, 450 nm, and 460 nm.

Preferably, a full width at half maximum of the light wave correspondingto the peak wavelength in the range of 430 nm to 460 nm is smaller than35 nm.

Preferably, the light source further includes a light wave with awaveband of 500 nm to 599 nm, and a ratio of the total number of thephotons of the light wave with the waveband of 620 nm to 760 nm to thetotal number of photons of the light wave with the waveband of 500 nm to599 nm is 3-8:1.

Preferably, the plant is selected from at least one of tomato, cucumber,sweet pepper, lettuce, rice, wheat, cotton and corn.

Preferably, the method specifically includes seeding and growthmanagement. The seeding adopts the prior art. The growth managementrefers to necessary management on the germinated plant, such asfertilization, watering, light source configuration and environmentcondition.

Preferably, the plant can be a medicinal material and a hemp plant.

Tomato: tomato, (scientific name: Lycopersicon esculentum Mill.), is anannual or perennial herb plant of Lycopersicon in Solanaceae ofTubiformes.

Cucumber: cucumber, (scientific name: Cucumis sativus L.), is an annualsarmentous or climbing herb plant of Cucurbitaceae.

Sweet pepper: green bell pepper, (scientific name: Capsicum annuum var.grossum), is commonly known as bell pepper, big capsicum and sweetpepper, also called Datongzi in Taiwan, belongs to a variety of pepperof Capsicum in Solanaceae, is distributed in the north and south ofChina mainland and belongs to a plant of a non-artificial introductionand cultivation type.

Lettuce: lettuce, (scientific name: Lactuca sativa Linn.), is an annualor biennial herb plant of Lactuca in Compositae.

Rice: rice is a genus in herbaceous oryza, belongs to cereals, is alsothe most important and long-standing type of grain in oryza, and isdifferent from upland rice.

Wheat: wheat is a common name of wheat plants, is a monocotyledonousplant, is a gramineous plant widely planted in all parts of the world,the caryopsis of wheat is one of the staple foods for human beings, andthe wheat can be made into bread, steamed bread, biscuits, noodles andthe like after being ground into flour, and can be made into beer,alcohol, Baijiu (such as vodka), or biofuel after being fermented.

Cotton: cotton is seed fiber of a Gossypium plant in Malvaceae, andoriginates in the subtropical zone.

Corn: corn, (Latin name: Zea mays L.), is an annual herb plant of Zea inGramineae.

Preferably, the method further includes growth environment conditions:an environment temperature is 21° C. to 24° C. at daytime and 18° C. to20° C. at night, and a humidity is 60% to 80%.

Preferably, a cultivation medium of the plant can be soil, and can alsobe a nutrient solution.

When the cultivation is performed by using the nutrient solution, youngseedlings can be separately planted onto a water cultivation module, 2/3root systems are maintained to be soaked in the nutrient solution, anddifferent nutrition solutions are used according to different plants.For example, a Hoagland nutrient solution is used as a nutrient solutionfor Lactuca sative. An EC of the nutrient solution is 1.6 to 1.8, a pHis 5.5 to 7.5, a temperature of the nutrient solution is 18° C. to 22°C., and a dissolved oxygen content is 5 mg/L to 6 mg/L.

Preferably, the method further includes seeding and pregermination. Forexample, a seeding and pregermination method for Lactuca sativeincludes: selecting and putting full Lactuca sative seeds into warmwater of 50° C. to 55° C. to be soaked for 15 min to 20 min; then,putting the seeds into clean water of 25° C. to 30° C. for seed soakingfor 7 h to 8 h; seeding the seeds subjected to seed soaking intoseedling breeding sponge blocks with one seed in each hole; adding purewater into a tray under the seedling breeding sponge blocks until thepure water level height is flushed with the lower surface of the spongeblocks; after seeding, spraying mist onto the seeds by a sprinkling canto maintain surface moisture; then, putting the seeds into apregermination box of 22° C. to 25° C. for pregermination; maintainingthe humidity at 70% to 80%; and spraying water onto the seeds once every12 h.

The present invention has the following beneficial effects by adoptingthe above technical solution.

1. Compared with traditional light sources, such as existing fluorescentlamps and HPS, the present invention adopting a mode of the light sourceproportion and light source combination can greatly improve the yield ofthe plant.

2. Compared with a traditional LED lamp light source proportion scheme,the light source proportion scheme of the present invention has theadvantages that the waveband of a selected light source is more precise,the influence caused by other plant growth parameters is small, and amore targeted effect and higher stability are achieved in the process ofpromoting plant growth. By using the precise combination and proportionof the precise waveband of the light wave, a peak wavelength and aphoton proportion, the present invention can more precisely control aplant growth effect, and thereby promoting the plant growth.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a light wave peak value of an LED lamp1.

FIG. 2 is a schematic diagram of a light wave peak value of an LED lamp2.

FIG. 3 is a schematic diagram of a light wave peak value of an LED lamp3.

FIG. 4 is a schematic diagram of a light wave peak value of an LED lamp4.

FIG. 5 is a schematic diagram of a light wave peak value of an LED lamp5.

FIG. 6 is a schematic diagram of a light wave peak value of an LED lamp6.

FIG. 7 is a schematic diagram of a light wave peak value of an LED lamp7.

FIG. 8 is a schematic diagram of a light wave peak value of an LED lamp8.

FIG. 9 is a schematic diagram of a light wave peak value of an LED lamp9.

FIG. 10 is a schematic diagram of a light wave peak value of an LED lamp10.

FIG. 11 is a schematic diagram of a light wave peak value of an LED lamp11.

FIG. 12 is a schematic diagram of a light wave peak value of an LED lamp12.

FIG. 13 is a schematic diagram of a light wave peak value of an LED lamp13.

FIG. 14 is a schematic diagram of a light wave peak value of an LED lamp14.

FIG. 15 is a schematic diagram of a light wave peak value of an LED lamp15.

FIG. 16 is a schematic diagram of a light wave peak value of an LED lamp16.

FIG. 17 is a schematic diagram of a light wave peak value of an LED lamp17.

FIG. 18 is a schematic diagram of a light wave peak value of an LED lamp18.

FIG. 19 is a schematic diagram of a light wave peak value of an LED lamp19.

FIG. 20 is a schematic diagram of a light wave peak value of an LED lamp20.

FIG. 21 is a schematic diagram of a light wave peak value of an LED lamp21.

FIG. 22 is a schematic diagram of a light wave peak value of an LED lamp22.

FIG. 23 is a schematic diagram of a light wave peak value of an LED lamp23.

DETAILED DESCRIPTION

In order to describe the technical content, structural features,achieved objectives and effects of the technical solution in detail,detailed descriptions are given in combination with specificembodiments.

TABLE 1 Material and manufacturer Note Material Manufacturer (ArticleNumber) Lvdie Lactuca Shandong Shouguang Hongwei sative Seed industryCo., Ltd Pakchoi Shandong Shouguang Hongwei Seed industry Co., LtdCherry radish Shandong Shouguang Hongwei Seed industry Co., Ltd CannabisFujian Zhongke Biological Co., seedling Ltd Cucumber seed Shanghai WELLSseed Co., Ltd 31201600076 Corn seed Shandong Shouguang Hongwei Zhengdan958 Seed industry Co., Ltd Tomato seed Known-you Seed Co., Ltd Known-you301 Sweet pepper Known-you Seed Co., Ltd seed Lettuce seed ShandongShouguang Hongwei Seed industry Co., Ltd Rice seed Shandong ShouguangHongwei Seed industry Co., Ltd Wheat seed Shandong Shouguang HongweiNongda 212 Seed industry Co., Ltd Pansy seed Japan Takii companyAnoectochilus Xiamen Jiasheng Biotechnology formosanus Co., Ltd bottleseedling Dendrobium Huoshan Changchong Traditional huoshanense ChineseMedical Material bottle seedling Development Co., Ltd

1. Leaf vegetables: full lvdie Lactuca sative seeds were selected andput into warm water of 50° C. to be soaked for 10 min, and were then putinto clean water of 30° C. for seed soaking for 8 h. The seeds subjectedto seed soaking were seeded into seedling breeding sponge blocks withone seed in each hole. Pure water was added into a tray under theseedling breeding sponge blocks until the pure water level height isflushed with the lower surface of the sponge blocks. After seeding, mistwas sprayed onto the seeds by a sprinkling can to maintain surfacemoisture. Then, the seeds were put into a pregermination box of 25° C.for pregermination, and the humidity was maintained at 80%. The seedswere sprayed with water every 12 h. When the Lactuca sative seedlingsgrew to 4-5 leaves and one shoot, the Lactuca sative seedlings wereseparately planted onto a water cultivation module, 2/3 root systemswere maintained to be soaked into a nutrient solution, an EC of thenutrient solution was 1.8, a pH was 6.0 to 7.0, a temperature of thenutrient solution was 22° C., and a dissolved oxygen content was 6 mg/L.An environment temperature condition was 23° C. at daytime and 18° C. atnight. The light source used a fluorescent lamp as a reference CK,spectrums of 2 comparative examples and 2 embodiments were set, a lightintensity was 250 μmol/m²·s, a light period was 9 h, and a plantingperiod was 20 d. The Lactuca sative was cultivated according to theabove cultivation method, light source parameters were used as eachembodiment and comparative example, a fresh weight of each plantobtained in each embodiment and comparative example was weighed toobtain an average weight, and the appearance was evaluated. Results areshown in Table. 2:

TABLE 2 Spectrum feature Ratio of the number of photons in a waveband of620 nm to 760 nm to the number of photons in a Ratio of the numberProportion 1 (%) of the number of photons waveband of 400 nm to 499 ofphotons in a in a waveband of 620 nm to 760 nm in the nm, peak value(nm), and full waveband of 620 nm whole light source, proportion 2 (%)of the width at half maximum (nm) to 760 nm to the number of photons ina waveband of 700 Full number of photons nm to 760 nm in the number ofthe photons width in a waveband of in the waveband of 620 nm to 760 nm,peak Peak at half 500 nm to 599 nm value, and full width at half maximum(nm) Number Lamp type Ratio value maximum Ratio Proportion 1 ComparativeFluorescent 0.4 — — 0.3 12.1 Example 1 lamp Comparative LED lamp 1 1.6450 20 1.3 39.1 Example 2 Comparative LED lamp 2 14.7 450 20 17.8 86.1Example 3 Embodiment 1 LED lamp 3 5.8 460 20 3.8 74.7 Embodiment 2 LEDlamp 4 4.1 460 20 8.0 64.0 Spectrum feature Proportion 1 (%) of thenumber of photons in a waveband of 620 nm to 760 nm in the whole lightsource, proportion 2 (%) of the number of photons in a waveband of 700nm to 760 nm in the number of the photons in the waveband of 620 nm to760 nm, peak value, and full width at half maximum (nm) Biological indexFull Fresh weight width of overground Peak at half part of plant Numbervalue maximum Proportion 2 (g/plant) Appearance Comparative — — 18.378.6 Normal Example 1 Comparative 660/735 20/23 18.8 80.12 NormalExample 2 Comparative 660/735 20/23 22.3 97.25 Abnormal Example 3(spindling, malformation and looseness) Embodiment 1 660/695 20/25 17.893.4 Normal Embodiment 2 660 20 16.1 99.3 Normal

Test data shows that: the yield of the light source scheme of theembodiment was at least improved by 18.8% compared with that of atraditional fluorescent lamp, and the appearance was good.

2. Root vegetables: full Est cherry radish seeds were selected and wereseeded into seedling breeding sponge blocks with one seed in each hole.Pure water was added into a tray under the seedling breeding spongeblocks until the pure water level height is flushed with the lowersurface of the sponge blocks. After seeding, mist was sprayed onto theseeds by a sprinkling can to maintain surface moisture. Then, the seedswere put into a pregermination box of 25° C. for pregermination, and thehumidity was maintained at 80%. After white seed surfaces were exposed,the seeds were moved to a position under an LED lamp for seedlingbreeding treatment. When the seedlings grew to 2 leaves and one shoot,the cherry radish seedlings were separately planted onto a watercultivation module, 2/3 root systems were maintained to be soaked into anutrient solution, an EC of the nutrient solution was 1.8, a pH was 6.0to 7.0, a temperature of the nutrient solution was 22° C., and adissolved oxygen content was 6 mg/L. An environment temperaturecondition was 23° C. at daytime and 18° C. at night. The light sourceused a fluorescent lamp as a reference CK, spectrums of 2 comparativeexamples and embodiments were set, a light intensity was 250 μmol/m²·s,a light period was 12 h, and a planting period was 18 d. The cherryradish was cultivated according to the above cultivation method, lightsource parameters were used as each embodiment and comparative example,a fresh weight of each plant of the cherry radish obtained in eachembodiment and comparative example was obtained. Results are shown inTable. 3:

TABLE 3 Spectrum feature Ratio of the number of Proportion 1 (%) of thenumber of photons photons in a waveband of in a waveband of 620 nm to760 nm in the 620 nm to 760 nm to the whole light source, proportion 2(%) of the number of photons in a Ratio of the number number of photonsin a waveband of 700 waveband of 400 nm to 499 of photons in a nm to 760nm in the number of the photons nm, peak value (nm), and full wavebandof 620 nm in the waveband of 620 nm to 760 nm, peak Biological width athalf maximum (nm) to 760 nm to the value, and full width at half maximum(nm) index Full number of photons Full Fresh weight width in a wavebandof width of single Peak at half 500 nm to 599 nm Proportion Peak at halfProportion tuberous Number Lamp type Ratio value maximum Ratio 1 valuemaximum 2 root/g Comparative Fluorescent 0.4 — — 0.3 12.1 — — 18.3 18.03Example 3 lamp Comparative LED lamp 5 1.4 460 20 7.0 52.2 660 20 7.819.25 Example 4 Comparative LED lamp 6 15.1 460 20 9.1 81.2 660 20 6.420.16 Example 5 Embodiment 3 LED lamp 7 4.5 460 20 7.3 72.0 660 20 7.824.67 Embodiment 4 LED lamp 8 (4) 4.1 460 20 8.0 64.0 660 20 16.1 25.46

Test data shows that: the yield of the light source scheme of theembodiment was at least improved by 36.8% compared with that of atraditional fluorescent lamp.

3. Cannabis: planting management: F variety cutting seedlings with goodrooting conditions were transplanted into a substrate or rock wool, 4 to8 plants were put in per square meter, an artificial light source wasused, a light intensity was 300 μmol/m² s, an illumination time was 18h, T=24° C.-26° C., and T=RH70%. Topping was performed when the plantheight was about 20 cm to trigger the side branch growth. After the sidebranches continuously grew for 2 weeks, topping treatment was performedto obtain more branches. After the vegetative growth period wascompleted, flower promoting treatment was performed for one week, femaleand male flowers were distinguished, male flowers were removed, andfemale plants were continuously cultivated. The light source used an HPSas a reference, spectrums of 2 comparative examples and 2 embodimentswere set, a light intensity was 750 μmol/m²·s, a light period was 12 h,and a planting period was 100 d. The cannabis was cultivated accordingto the above cultivation method, light source parameters were used aseach embodiment and comparative example, a THC total content of thecannabis in each embodiment and comparative example was obtained.Results are shown in Table. 4:

TABLE 4 Spectrum feature Ratio of the number of Proportion 1 (%) of thenumber of photons photons in a waveband of in a waveband of 620 nm to760 nm in the 620 nm to 760 nm to the whole light source, proportion 2(%) of the number of photons in a number of photons in a waveband of 700waveband of 400 nm to 499 Ratio of the number nm to 760 nm in the numberof the photons nm, peak value (nm), and full of photons in a in thewaveband of 620 nm to 760 nm, peak Biological width at half maximum (nm)waveband of 620 nm value, and full width at half maximum (nm) index Fullto 760 nm to the Full THC width number of photons width total Peak athalf in a waveband of Proportion Peak at half Proportion content NumberLamp type Ratio value maximum 500 nm to 599 nm 1 value maximum 2(g/plant) Comparative HPS 6.5 — — 0.5 25.3 — — 21.0 56.3 Example 6Comparative LED lamp 9 1.4 450 20 5.1 50.6 655 20 25.9 57.6 Example 7Comparative LED lamp 10 10 460 20 12.5 81.3 660/730 20/25 18.3 50.4Example 8 Embodiment 5 LED lamp 11 6.4 460 20 3.6 64.3 680/730 25/2537.4 74.6 Embodiment 6 LED lamp 12 5.2 435 20 6.9 70.7 660/730 20/2517.6 69.1

Test data shows that: the THC total content of the light source schemeof the embodiment was at least improved by 22.7% compared with that of atraditional high-pressure sodium lamp.

4. Cucumber: planting management: full 83-16 fruit cucumber seeds wereselected and put into warm water of 55° C. for warm water seed soakingfor 10 min, and were then put into clean water of 30° C. for seedsoaking for 8 h. The seeds were wrapped by gauzes and put into anincubator of 30° C. for pregermination. After white seed surfaces wereexposed, the seeds were seeded into seedling breeding sponge blocks withone seed in each hole. Pure water was added into a tray under theseedling breeding sponge blocks until the pure water level height isflushed with the lower surface of the sponge blocks. After seeding, mistwas sprayed onto the seeds by a sprinkling can to maintain surfacemoisture. Then, the seeds were put under a conventional seedlingbreeding lamp for illustration treatment. When the cucumber seedlingsgrew to 4-5 leaves and one shoot, the cucumber seedlings were separatelyplanted onto a water cultivation module, a plantation density was 8plants/m², 2/3 root systems were maintained to be soaked into a nutrientsolution, an EC of the nutrient solution was 2.2, a pH was 6.0 to 7.0, atemperature of the nutrient solution was 22° C., and a dissolved oxygencontent was 6 mg/L. An environment temperature condition was 28° C. atdaytime and 18° C. at night. The light source used an HPS as areference, spectrums of 2 comparative examples and 2 embodiments wereset, a light intensity was 400 μmol/m²·s, a light period was 12 h, and aplanting period was 50 d. The cucumber was cultivated according to theabove cultivation method, light source parameters were used as eachembodiment and comparative example, a unit area yield of the cucumber ineach embodiment and comparative example was obtained. Results are shownin Table 5:

TABLE 5 Spectrum feature Ratio of the number of Proportion 1 (%) of thenumber of photons photons in a waveband of in a waveband of 620 nm to760 nm in the 620 nm to 760 nm to the whole light source, proportion 2(%) of the number of photons in a number of photons in a waveband of 700waveband of 400 nm to 499 Ratio of the number nm to 760 nm in the numberof the photons nm, peak value (nm), and full of photons in a in thewaveband of 620 nm to 760 nm, peak width at half maximum (nm) wavebandof 620 nm value, and full width at half maximum (nm) Full to 760 nm tothe Full Biological width number of photons width index Peak at half ina waveband of Proportion Peak at half Proportion Yield Number Lamp typeRatio value maximum 500 nm to 599 nm 1 value maximum 2 (kg/m²)Comparative HPS 6.5 — — 0.5 25.3 — — 21.0 14.6 Example 9 Comparative LEDlamp 13 1.6 450 20 2.0 44.4 660 20 11.7 13.5 Example 10 Comparative LEDlamp 14 9.6 450 20 15.2 79.3 660 20 14.7 10.6 Example 11 Embodiment 7LED lamp 15 4.9 460 20 5.3 68.5 660 20 16.2 17.9 Embodiment 8 LED lamp16 6.4 435 20 4.0 69.5 660/680 20/25 3.2 18.4

Test data shows that: the cucumber yield of the light source scheme ofthe embodiment was at least improved by 22.6% compared with that of atraditional high-pressure sodium lamp.

5. Sweet pepper: planting management: full Jinhuaxing sweet pepper seedswere selected and put into warm water of 55° C. for warm water seedsoaking for 10 min, and were then put into clean water of 30° C. forseed soaking for 8 h. The seeds were wrapped by gauzes and put into anincubator of 30° C. for pregermination. After white seed surfaces wereexposed, the seeds were seeded into seedling breeding sponge blocks withone seed in each hole. Pure water was added into a tray under theseedling breeding sponge blocks until the pure water level height isflushed with the lower surface of the sponge blocks. After seeding, mistwas sprayed onto the seeds by a sprinkling can to maintain surfacemoisture. Then, the seeds were put under a conventional seedlingbreeding lamp for illustration treatment. When the sweet pepperseedlings grew to 6-7 leaves and one shoot, the sweet pepper seedlingswere separately planted onto a water cultivation module, a plantationdensity was 8 plants/m², 2/3 root systems were maintained to be soakedinto a nutrient solution, an EC of the nutrient solution was 2.2, a pHwas 6.0 to 7.0, a temperature of the nutrient solution was 22° C., and adissolved oxygen content was 6 mg/L. An environment temperaturecondition was 26° C. at daytime and 18° C. at night. The light sourceused a fluorescent lamp as a reference, spectrums of 2 comparativeexamples and 2 embodiments were set, a light intensity was 400μmol/m²·s, a light period was 12 h, and a planting period was 120 d. Thesweet pepper was cultivated according to the above cultivation method,light source parameters were used as each embodiment and comparativeexample, a unit area yield of the sweet pepper in each embodiment andcomparative example was obtained. Results are shown in Table 6:

TABLE 6 Spectrum feature Ratio of the number of Proportion 1 (%) of thenumber of photons photons in a waveband of in a waveband of 620 nm to760 nm in the 620 nm to 760 nm to the whole light source, proportion 2(%) of the number of photons in a number of photons in a waveband of 700waveband of 400 nm to 499 Ratio of the number nm to 760 nm in the numberof the photons nm, peak value (nm), and full of photons in a in thewaveband of 620 nm to 760 nm, peak width at half maximum (nm) wavebandof 620 nm value, and full width at half maximum (nm) Full to 760 nm tothe Full Biological width number of photons width index Peak at half ina waveband of Proportion Peak at half Proportion Yield Number Lamp typeRatio value maximum 500 nm to 599 nm 1 value maximum 2 (kg/m²)Comparative Fluorescent 0.4 — — 0.3 12.1 — — 18.3 11.6 Example 12 lampEmbodiment 9 LED lamp 17 4.7 450 20 4.1 66.4 660 20 8.5 13.7 Embodiment10 LED lamp 18 4.5 436/455 20/20 5.7 70.4 660/735 20/25 8.8 14.6

Test data shows that: the sweet pepper yield of the light source schemeof the embodiment was at least improved by 18.1% compared with that of atraditional fluorescent lamp.

6. Wheat: planting management: full Nongda 212 wheat seeds were selectedand were soaked in clean water. After sufficient soaking, the seeds weresubjected to seed bud vernalization treatment at a temperature of 4° C.for 15 d. The seed buds subjected to vernalization treatment were seededinto a pot of 30 cm×30 cm, and a cultivation substrate was a mixture ofpeat and vermiculite according to a ratio of 2V:1V. The substrate waswatered if it was dry, and did not need to be watered if it was not dry.A compound fertilizer was applied once about every two weeks, and aconcentration was 800 to 1000 times. During head sprouting,monopotassium phosphate was sprayed and applied as foliar fertilizerapplication, and other management was conventional management. Anenvironment temperature condition was 25° C. at daytime and 18° C. atnight. The light source used an HPS as a reference, spectrums of 2comparative examples and 2 embodiments were set, a light intensity was500 μmol/m²·s, a light period was 12 h, and a planting period was 100 d.The wheat was cultivated according to the above cultivation method,light source parameters were used as each embodiment and comparativeexample, a hundred-grain weight of the wheat in each embodiment andcomparative example was obtained. Results are shown in Table 7:

TABLE 7 Spectrum feature Ratio of the number of Proportion 1 (%) of thenumber of photons photons in a waveband of in a waveband of 620 nm to760 nm in the 620 nm to 760 nm to the whole light source, proportion 2(%) of the number of photons in a number of photons in a waveband of 700waveband of 400 nm to 499 Ratio of the number nm to 760 nm in the numberof the photons nm, peak value (nm), and full of photons in a in thewaveband of 620 nm to 760 nm, peak width at half maximum (nm) wavebandof 620 nm value, and full width at half maximum (nm) Biological Full to760 nm to the Full index width number of photons width Hundred- Peak athalf in a waveband of Proportion Peak at half Proportion grain NumberLamp type Ratio value maximum 500 nm to 599 nm 1 value maximum 2 weight(g) Comparative HPS 6.5 — — 0.5 25.3 — — 21.0 2.6 Example 13 Embodiment11 LED lamp 19 6.0 450 20 3.6 66.3 660/735 20/25 19.8 3.5 Embodiment 12LED lamp 20 5.5 440/460 20/20 3.8 67.0 660/740 20/25 21.4 3.7

Test data shows that: the wheat hundred-grain weight of the light sourcescheme of the embodiment was at least improved by 34.6% compared withthat of a traditional high-pressure sodium lamp.

7. Corn: planting management: corn seeds were wrapped by gauzes andsoaked in clean water for pregermination at a temperature of 30° C. to35° C. During the period, clean water was changed every day. Peat soiland vermiculite were mixed according to a ratio of 2:1, and were chargedinto a 32-hole seedling breeding tray. After white seed surfaces wereexposed, the seeds were seeded at a density of one seed in each hole anda seeding depth of about 2 cm. Soil was covered, the cultivation soilwas impregnated by clean water, and covered with a preservative film.The preservative film was removed after budding. When the seedlings grewto 2 leaves and one shoot, the seedlings were transplanted into nutrientbags of 30 cm×30 cm, a cultivation substrate was a mixture of peat andvermiculite according to a ratio of 2V:1V. Since pot cultivation wasused, in order to prevent root rot due to excessive water content,watering was performed if the substrate was dry, and watering was notperformed if the substrate was not dry. A jointing fertilizer was usedin a jointing period, and a compound fertilizer of 800 to 1000 times ofliquid was applied once about every two weeks. An environmenttemperature condition was 25° C. at daytime and 18° C. at night. Thelight source used an HPS as a reference, spectrums of 2 comparativeexamples and 2 embodiments were set, a light intensity was 500μmol/m²·s, a light period was 12 h, and a planting period was 100 d. Thecorn was cultivated according to the above cultivation method, lightsource parameters were used as each embodiment and comparative example,a corn yield in each embodiment and comparative example was obtained.Results are shown in Table 8:

TABLE 8 Spectrum feature Ratio of the number of Proportion 1 (%) of thenumber of photons photons in a waveband of in a waveband of 620 nm to760 nm in the 620 nm to 760 nm to the whole light source, proportion 2(%) of the number of photons in a number of photons in a waveband of 700waveband of 400 nm to 499 Ratio of the number nm to 760 nm in the numberof the photons nm, peak value (nm), and full of photons in a in thewaveband of 620 nm to 760 nm, peak width at half maximum (nm) wavebandof 620 nm value, and full width at half maximum (nm) Biological Full to760 nm to the Full index width number of photons width Hundred- Peak athalf in a waveband of Proportion Peak at half Proportion grain NumberLamp type Ratio value maximum 500 nm to 599 nm 1 value maximum 2 weight(g) Comparative HPS 6.5 — — 0.5 25.3 — — 21.0 28.6 Example 14 Embodiment13 LED lamp 21 4.2 450 20 5.1 67.8 680/730 25/25 19.7 31.9 Embodiment 14LED lamp 22 5.5 440/460 20/20 3.8 67.0 660/740 20/25 21.4 32.7

Test data shows that: the corn hundred-grain weight of the light sourcescheme of the embodiment was at least improved by 11.5% compared withthat of a traditional high-pressure sodium lamp.

8. Rice: rice seeds were wrapped by gauzes and soaked in clean water forpregermination at a temperature of 35° C. In the period, clean water waschanged every day. Peat soil and vermiculite were mixed according to aratio of 2:1, and were charged into a 72-hole seedling breeding tray.After white seed surfaces were exposed, the seeds were shallowly seededat a density of one seed in each hole and a seeding depth of 1.5 cm.Soil was covered, the cultivation soil was impregnated by clean water,and covered with a preservative film. The seeds were put under aseedling breeding lamp, and the preservative film was removed afterbudding. A light period of seedling breeding light was 12 h/d, a lightintensity was 250 μmol/m²·s to 300 μmol/m²·s, a self-made nutrientsolution 200-time liquid of the company, or a compound fertilizer of 800to 1000 times of liquid was used, fertilization was performed once every10 d, and an environment diurnal temperature was 25° C./21° C. After theseedling emergence of rice seedlings for 45 d, the seedlings weretransplanted into a cultivation pot, and were then put under a ricecultivation lamp to be cultivated. Fertilization was performed onceevery 20 d to 25 d. A liquid nitrogen fertilizer of 1000 times of liquidwas additionally applied twice in a tillering period, fertilization wasperformed once every 10 d in a flowering and filling period,fertilization was not performed in a grain color change mature period,and an environment diurnal temperature was 25° C.-28° C./21° C. Thelight source used an HPS as a reference, spectrums of 2 comparativeexamples and 2 embodiments were set, a light intensity was 450μmol/m²·s, a light period was 12 h, and a planting period was 100 d. Therice was cultivated according to the above cultivation method, lightsource parameters were used as each embodiment and comparative example,a thousand-grain weight and the setting rate of the rice in eachembodiment and comparative example was obtained. Results are shown inTable 9.

TABLE 9 Spectrum feature Ratio of the number of Proportion 1 (%) of thenumber of photons photons in a waveband of in a waveband of 620 nm to760 nm in the 620 nm to 760 nm to the whole light source, proportion 2(%) of the number of photons in a number of photons in a waveband of 700waveband of 400 nm to 499 Ratio of the number nm to 760 nm in the numberof the photons nm, peak value (nm), and full of photons in a in thewaveband of 620 nm to 760 nm, peak Biological width at half maximum (nm)waveband of 620 nm value, and full width at half maximum (nm) index Fullto 760 nm to the Full Set- width number of photons width ting Peak athalf in a waveband of Proportion Peak at half Proportion TKW rate NumberLamp type Ratio value maximum 500 nm to 599 nm 1 value maximum 2 (g) (%)Comparative HPS 6.5 — — 0.5 25.3 — — 21.0 21.7 75.8 Example 15Embodiment 15 LED lamp 23 4.2 450 20 5.1 67.8 680/730 25/25 19.7 25.280.1 Embodiment 16 LED lamp 24 5.5 440/460 20/20 3.8 67.0 660/740 20/2521.4 24.1 79.0

Test data shows that: the rice thousand-grain weight of the light sourcescheme of the embodiment was at least improved by 11.1% and the settingrate was improved by at least 4.2% compared with those of a traditionalhigh-pressure sodium lamp.

9. Anoectochilus formosanus: Anoectochilus formosanus seedlings weretaken out from a tissue culture bottle, a substrate was cleanly flushedby clean water, and the completeness of stems and roots should beensured in the flushing process. After the clean flushing, the seedlingswere put into a potassium permanganate solution with a concentration of0.1% to be soaked for 5 min for disinfection and sterilization. Thesterilized seedlings were put into a sterile pot for use. After thepotassium permanganate on the leaf surfaces of the Anoectochilusformosanus was evaporated, the seedlings were separately planted into amixed substrate prepared from peat soil, vermiculite and river sandaccording to a ratio of 1:1:1 (the substrate had subjected to autoclavedsterilization), a specific nutrient solution was used to replace sterilewater for mixing, and a soil humidity was 80%. The substrate wasseparately charged into planting pots of 25 cm*25 cm*25 cm. After theseparate planting of the Anoectochilus formosanus seedlings according toa certain plant gap of 2 cm was completed, the Anoectochilus formosanusseedlings were moved in an artificial light environment for cultivation.The light source used a fluorescent lamp as a reference, spectrums of 2comparative examples and 2 embodiments were set, a light intensity was60±5 μmol/m²·s, a light period was 14 h/d, and a planting period was 120d. The Anoectochilus formosanus was cultivated according to the abovecultivation method, light source parameters were used as each embodimentand comparative example, a fresh weight and a dry weight of theAnoectochilus formosanus in each embodiment and comparative example wereobtained. Results are shown in Table 10:

TABLE 10 Spectrum feature Ratio of the number of Proportion 1 (%) of thenumber of photons photons in a waveband of in a waveband of 620 nm to760 nm in the 620 nm to 760 nm to the whole light source, proportion 2(%) of the number of photons in a number of photons in a waveband of 700waveband of 400 nm to 499 Ratio of the number nm to 760 nm in the numberof the photons nm, peak value (nm), and full of photons in a in thewaveband of 620 nm to 760 nm, peak width at half maximum (nm) wavebandof 620 nm value, and full width at half maximum (nm) Full to 760 nm tothe Full Biological index width number of photons width Fresh Dry Peakat half in a waveband of Propor- Peak at half Propor- weight weightNumber Lamp type Ratio value maximum 500 nm to 599 nm tion 1 valuemaximum tion 2 (g/plant) (g/plant) Comparative Fluores- 0.4 — — 0.3 12.1— — 18.3 2.81 217.54 Example 16 cent lamp Embodiment LED lamp 3.5 435 205.4 66.4 660/685 20/25 4.6 3.67 273.86 17 25 Embodiment LED lamp 5.0 45020 5.7 66.6 650 70 23.4 3.80 272.36 18 26

Test data shows that: the Anoectochilus formosanus fresh weight and dryweight of the light source scheme of the embodiment were at leastimproved by 30.6% and 25.2% compared with those of a traditionalfluorescent lamp.

10. Dendrobium huoshanense: Dendrobium huoshanense seedlings were takenout from a tissue culture bottle, a substrate was cleanly flushed byclean water, and the completeness of stems and roots should be ensuredin the flushing process. After the clean flushing, the seedlings wereput into chlorothalonil with a concentration of 1000 times of liquid fordisinfection and sterilization. The sterilized seedlings were put into asterile pot for use. After the Dendrobium huoshanense tissue cultureseedlings rooted and became white, the seedlings were separately plantedinto a big pine bark substrate, and the substrate was soaked for 1 d byclean water in advance. The Dendrobium huoshanense seedlings wereseparately planted according to a certain plant gap of 3 cm. Then, theplanting pot was moved in an artificial light environment forcultivation. After the transplantation for 2 weeks, a leaf fertilizerwas sprayed and applied to prevent and treat yellow leaves. In the wholecultivation process, a specific nutrient solution was sprayed once every15 d, a substrate humidity was maintained at 70%, and a diurnaltemperature of the cultivation temperature was 28° C./21° C. The lightsource used a fluorescent lamp as a reference, spectrums of 2comparative examples and 2 embodiments were set, a light intensity was60±5 μmol/m²·s, a light period was 16 h/d, and a planting period was 120d. The Dendrobium huoshanense was cultivated according to the abovecultivation method, light source parameters were used as each embodimentand comparative example, a fresh weight and a dry weight of theDendrobium huoshanense in each embodiment and comparative example wereobtained. Results are shown in Table 11:

TABLE 11 Spectrum feature Ratio of the number of Proportion 1 (%) of thenumber of photons photons in a waveband of in a waveband of 620 nm to760 nm in the 620 nm to 760 nm to the whole light source, proportion 2(%) of the number of photons in a number of photons in a waveband of 700waveband of 400 nm to 499 Ratio of the number nm to 760 nm in the numberof the photons nm, peak value (nm), and full of photons in a in thewaveband of 620 nm to 760 nm, peak width at half maximum (nm) wavebandof 620 nm value, and full width at half maximum (nm) Full to 760 nm tothe Full Biological index width number of photons width Fresh Dry Peakat half in a waveband of Propor- Peak at half Propor- weight weightNumber Lamp type Ratio value maximum 500 nm to 599 nm tion 1 valuemaximum tion 2 (g/plant) (g/plant) Comparative Fluores- 0.4 — — 0.3 12.1— — 18.3 0.51 72.25 Example 17 cent lamp Embodiment LED lamp 6.2 436/45520/20 6.7 74.6 675/695 25/25 13.3 0.59 95.50 19 27 Embodiment LED lamp6.4 450 20 4.5 68.2 690 25 27.2 0.57 80.29 20 28

Test data shows that: the Dendrobium huoshanense fresh weight and dryweight of the light source scheme of the embodiment were at leastimproved by 11.7% and 11.1% compared with those of a traditionalfluorescent lamp.

11. Pansy cultivation: full pansy seeds were selected, were soaked inclean water for 4 h, and were then seeded into seedling breeding spongeblocks with one seed in each hole. Pure water was added into a trayunder the seedling breeding sponge blocks until the pure water levelheight is flushed with the lower surface of the sponge blocks. Afterseeding, the seeds were put into a pregermination box of 24° C. forpregermination, and the humidity was maintained at 70%. Mist was sprayedonto the seeds every 24 h. When the pansy seedlings grew to 4-5 leavesand one shoot, the pansy seedlings were separately planted onto a watercultivation module, 2/3 root systems were maintained to be soaked into anutrient solution, an EC of the nutrient solution was 1.6, a pH was 6.0,a temperature of the nutrient solution was 20° C., and a dissolvedoxygen content was 5 mg/L. An environment temperature condition was 23°C. at daytime and 18° C. at night. The light source used a fluorescentlamp as a reference, spectrums of 2 comparative examples and 2embodiments were set, a light intensity was 300 μmol/m²·s, a lightperiod was 12 h, and a planting period was 25 d. The pansy wascultivated according to the above cultivation method, light sourceparameters were used as each embodiment and comparative example, a pansyflowering quantity in each embodiment and comparative example wasobtained. Results are shown in Table 12:

TABLE 12 Spectrum feature Ratio of the number of Proportion 1 (%) of thenumber of photons photons in a waveband of in a waveband of 620 nm to760 nm in the 620 nm to 760 nm to the whole light source, proportion 2(%) of the number of photons in a number of photons in a waveband of 700waveband of 400 nm to 499 Ratio of the number nm to 760 nm in the numberof the photons nm, peak value (nm), and full of photons in a in thewaveband of 620 nm to 760 nm, peak Biological width at half maximum (nm)waveband of 620 nm value, and full width at half maximum (nm) index Fullto 760 nm to the Full Flowering width number of photons width quantityPeak at half in a waveband of Proportion Peak at half Proportion(flowers/ Number Lamp type Ratio value maximum 500 nm to 599 nm 1 valuemaximum 2 plant) Comparative Fluorescent 0.4 — — 0.3 12.1 — — 18.3 182Example 18 lamp Embodiment 21 LED lamp 29 5.5 440/460 20/20 8.0 75660/735 20/25 18.4 228 Embodiment 22 LED lamp 30 4.3 450 20 5.3 70 69525 36.6 215

Test data shows that: the pansy flowering quality of the light sourcescheme of the embodiment was at least improved by 18.1% compared withthat of a traditional fluorescent lamp.

Although the foregoing embodiments have been described, those skilled inthe art can make additional changes and modifications to theseembodiments once they learn the basic creative concept. Therefore, theforegoing description is only the embodiments of the present invention,and does not limit the scope of patent protection of the presentinvention. An equivalent structure or an equivalent processtransformation made by using the specification of the present invention,or direct or indirect application to other related technical fields areincluded within the protection scope of the present invention.

What is claimed is:
 1. A light source for indoor plant cultivation,wherein the light source comprises a light wave with a waveband of 620nm to 760 nm, and the number of photons of the light wave of 620 nm to760 nm accounts for 64% to 76% of the total number of photons of thelight source.
 2. The light source for indoor plant cultivation accordingto claim 1, wherein the number of photons in a waveband of 700 nm to 760nm in the light source accounts for 3% to 38% of the number of thephotons in the waveband of 620 nm to 760 nm.
 3. The light sourceaccording to claim 2, wherein a peak wavelength of the light wave withthe waveband of 620 nm to 760 nm is preferably in a range of 650 nm to700 nm or 730 nm to 740 nm.
 4. The light source according to claim 3,wherein the peak wavelength of the light wave with the waveband of 620nm to 760 nm is preferably one or a combination of two or three of 650nm, 660 nm, 680 nm, 695 nm, and 735 nm.
 5. The light source according toclaim 3, wherein a full width at half maximum of the light wavecorresponding to the peak wavelength in the range of 650 nm to 700 nm or730 nm to 740 nm is smaller than 35 nm.
 6. The light source according toclaim 2, wherein the light source further comprises a light wave with awaveband of 400 nm to 499 nm, and a ratio of the total number of thephotons in the waveband of 620 nm to 760 nm to the total number ofphotons in the waveband of 400 nm to 499 nm is 4-7:1.
 7. The lightsource according to claim 5, wherein a peak wavelength of the light wavewith the waveband of 400 nm to 499 nm is preferably in a range of 430 nmto 460 nm.
 8. The light source according to claim 5, wherein the peakwavelength of the light wave with the waveband of 400 nm to 499 nm ispreferably one or a combination of any two or three of 435 nm, 440 nm,450 nm, and 460 nm.
 9. The light source according to claim 6, wherein afull width at half maximum of the light wave corresponding to the peakwavelength in the range of 430 nm to 460 nm is smaller than 35 nm. 10.The light source according to claim 5, wherein the light source furthercomprises a light wave with a waveband of 500 nm to 599 nm, and a ratioof the total number of the photons of the light wave with the wavebandof 620 nm to 760 nm to the total number of photons of the light wavewith the waveband of 500 nm to 599 nm is 3-8:1.